Re: [PATCH net-next v2 7/7] arm64: dts: mt7622: add mt7531 dsa to bananapi-bpi-r64 board

Landen Chao
2020-08-19T08:15:12Z

On Wed, 2020-08-19 at 00:24 +0800, Vladimir Oltean wrote:
> On Tue, Aug 18, 2020 at 03:14:12PM +0800, Landen Chao wrote:
> > Add mt7531 dsa to bananapi-bpi-r64 board for 5 giga Ethernet ports support.
> >
> > Signed-off-by: Landen Chao <landen.chao@mediatek.com>
> > ---
> > .../dts/mediatek/mt7622-bananapi-bpi-r64.dts | 44 +++++++++++++++++++
> > 1 file changed, 44 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts b/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
> > index d174ad214857..c57b2571165f 100644
> > --- a/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
> > +++ b/arch/arm64/boot/dts/mediatek/mt7622-bananapi-bpi-r64.dts
> > @@ -143,6 +143,50 @@
> > mdio: mdio-bus {
> > #address-cells = <1>;
> > #size-cells = <0>;
> > +
> > + switch@0 {
> > + compatible = "mediatek,mt7531";
> > +
[snip]
> > + port@6 {
> > + reg = <6>;
> > + label = "cpu";
> > + ethernet = <&gmac0>;
> > + phy-mode = "2500base-x";
> > + };
>
> Is there any reason why you're not specifying a fixed-link node here?
I got the below feedback in v1, so I follow the DSA common design in v2.
v2 can work with fixed-link node or without fixed-link node in CPU port
node.

"This fixed-link should not be needed. The DSA driver is supposed to
configure the CPU port to its fastest speed by default. 2500 is
the fastest speed a 2500Base-X link can do..."
> > + };
> > + };
> > +
> > };
> > };
> >
> > --
> > 2.17.1
>
> Thanks,
> -Vladimir